1. Faculty of Sciences, Department of Chemistry, Muğla Sitki Kocman University, Kötekli, Muğla, Turkey;
2. H.E.J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi, Pakistan;
3. Department of Chemistry, University of Karachi, Karachi, Pakistan;
4. Department of Chemistry, University of Malaya, Kuala Lumpur, Malaysia